Improvement in oscillating printing-presses



t e e h S s t I9 e h S 3 S E UR 97G N in L N II R 5 G NN I N T A m WI CS 0 PatentedNov. 2,1875.

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Inventors.

Witnesses. WQWW.

' 5 Sheets-Sheet 2. J. WATSON 80. L. De HUFF.

OSCILLATING PRINTING-PRESS.

Patented Nov. 2,1875.

Fig. 2.

Inventors.

- 5Sheets-Sheet {1. J. WATSON & J'. L. .DeHUFI'.

OSCILLATING PRINTING-PRESS.

No. ,169, 60 5. Patented ifov. 2,1875.

Fig. 4. 1

Witnesses. Inventors.

UNITED STATEs PATENT OE IoE;

JOSEPH WATSO OF EVERETT, AND H L. DE HUFF, OF WOBURN, MASS.; SAID DEHUFF ASSIGNOR T0 SAID WATSON.

IMPROVEMENT IN OSClLLATING PRl'NTlN G-PR'ESSES.

Specification forming part of Letters Patent No. 169,605, dated November2, 1875 August 26, 1875.

To all whom at may concern:

Be it known. that we, JOSEPH WATSON, of Everett, and JOHN L. DE HUFF, ofWoburn, both in the county of Middlesex and State of Massachusetts, havejointly invented certain new and useful Improvements in Printing-Presses, of which the following, taking in connection with theaccompanying drawings, is'a specification.

The first part of our invention relates to themanner of constructing andhanging the typebed and itconsists in pivoting the bed to the frame at apoint near its upper edge, but in the rear of its face upon which thetype are to rest, in such amanner that'the bed may be swung up into aposition nearly at rightangles to its position when an impression istaken, to make the type-form more conveniently accessible for makingchanges, corrections, &c., without the necessity of removing the chasefrom the press to an imposing-stone, and so that the bed, when notsupported in such elevated position, will fall, and be retained inproper position for taking an impression by the force of gravity. Itfurther consists in the combination, with a type-bed pivoted as abovedescribed, of one or more adjustable bearing-points, against which thelower portion of the back Side .of the bed rests when in position fortaking an impression.

The second part of our invention relates to a device for throwing offthe card or envelope after the impression has been taken; and itconsists in the use of a knock-ofl finger resting on the upper surfaceof the tympan-sheet, and attached to a rod or bar mounted in suitablebearings on the under side of the platen, and having a spring connectedtherewith in such a manner that the tension of said spring tends to movethe rod and knock-offfiuger to- Ward the card or envelope, for thepurpose of knocking the card or envelope off from the platen andsuitable devices for moving back said rod and knock-off finger, andlocking the same, and a device for releasing the look, so as to allowthe spring to act at the proper time, as will be further described.

In the drawings, Figure 1 is a plan, Fig. 2 a side elevation, Fig. 3 afront elevation, with aportion of the ribs on the platen broken away,

application filed and Fig. 4 a vertical section on line '09 won Figs. 1and 3, all illustrating a press embodying our invention. Fig. 5 is asideelevation, showing the type-bed thrown up in position for locking up aform or making corrections, the knock-ofl devices being'nemoved.

A is the frame; B, the platen, constructed, arranged, and operatedsubstantially as described in a pending application of John L.

DeHufi filed June 29, 1875 5 G, the operat ing hand-lever, and D thebed. The bed D is provided with ears a a, by which, and the wristpins bb, it is pivoted to the frame A at a point in the rear of the upper edgeof said bed, as shown.

The bed D naturally hangs in the position shownin Figs. 2 and 4, withthe rear side of its lower portion resting against the adjustingscrews 00, in which position it is retained by force of gravity.

The bed D is also provided with a projecting lug, d, on its back Side,near the lower edge, which serves to hook over the upper edge of theplaten B when the bed is thrown up into the position seen in Fig. 5.This arrangement of the typebed is a very great convenience, in that itsaves a great deal of labor and a great many steps for the operator, itbeing very much less labor to swing the bed up into the position showninFig. 5, and make the corrections or adjustments of the form on the bed,than it is to take out the chase, carry it to' an imposing-stone, makethe correctionsand changes, and replace the chase on the bed again. E isa rod or bar, mounted in suitable bearings e f on the under side of theplaten B, in a position about under the center of the width of theplaten, and parallel with the face of the laten and the axis about whichthe platen vibrates to give the impression. F is a spiral springsurrounding the rod E, one end of which bears against the bearing 0 and.the other against the pin 9 set in the rod E. The rod E projects beyondthe end of the platen on the right, and has adjustably secured theretothe hub or boss G, to the upper side of which is secured thelightspring-finger or knock-oft plunger h, of the form shown, arranged torest in close contact with the upper surface 'of the tympan-sheet H,with its end 2 I I a 169,605

just back of the line of the end of a card or envelope resting againstthe gage-pins i z' and j. The left-hand end of the bar or rod E ispivoted to the upper end of the radius-arm I, the outer edge of which ismadecurved or cam-shaped, as shown, from 70 to l, and has formed on orsecured to its upper end, the projecting toe m arranged to engage withthe pivoted latch J when the rod E is forced back by'the cam-edge of theradius-arm I coming in contact with the stationary arm K during the lastpart of the downward motion of the platen. The latch J is pivoted at ntoa stand or ear cast upon or secured to the under side of the platen, asshown, and has pivoted to its lower end the pawl-hook L, held in aposition nearly at right angles to the latch J by the stop-pin 0, set insaid latch, and adapted u to engage by its hook with a pin, 19, set in afixed position in the frame A.

The operation of our improved device for discharging the card orenvelope from the platen after'it has been printed is as follows:Theparts being in the positions shown in Figs. 1, 2, 3, and 4, theradius-arm I has been thrown back by coming in contact with the fixedarm K and carried with it, the bar or rod E com.- pressing the spring Fand moving the knockoff finger or plunger h back, so that its inner endis outside or to the rightof the gage-pin 7'. The card or envelope to beprinted is now placed on the platen, with its lower edge resting againstthe gage-pins i 1;, and its righthand end against'the gage-pin j in awellknown manner. The operator now gives the impression by moving thehand-lever 0 toward the front of the machine, and downward, the upwardmotion of the platen, and the parts attached thereto, causing the hookof the pawl L to pass over the pin 1 When theimpression is completed andthe operator begins to raise the hand-lever G, and

as soon as the platen has descended far enough to release the card orenvelope from the grasp of the holding-nippers, (if such are used,) thehook of the pawl engages With the pin 17, and by stopping the motion ofthe lower end of the latch J while its fulcrum continues to move, causesits upper end to be disengaged from the toe m, when the expansion of thespring F causes the rod E and knockoff finger h to he suddenly moved tothe left, the finger h striking the edge of the card or envelope asudden sharp blow, and throwing it off from the platen toward the left.

A continuation of the downward motion of I the platen causes thecam-edge of the radiusarm I to be brought in contact with and pass downby the arm K, throwing back the rod E. and finger h, compressing thespring F, and Withdrawing the toe-m from the path of the latch-lever,the upper end of which is thrown in front of toe. on by thepreponderance of weight in its lower end; thus holding the finger itback until again tripped by the pawl L coming in contact with the pin19, as before described.

M is the ink-distributing plate, and r r are the holding-screwsforsecuring the chase to the bed.

What we claim as new, and desire to'secure by Letters Patent of theUnited States, is-

1. A type-bed of a printing-press, pivoted,

'at or near its upper edge, to the frame, and

ing or regulating screws, 0 0, arranged to operate substantially asdescribed.

4. The knock-01f finger h, rod E, spring F, radius-arm I, provided withthe toe m and cam is l, the latch J adapted to engage with the toe m,and stationary arm K, for retracting the rod E and spring F, andmechanism, substantially as herein setforth, for tripping the latch J,all constructed, combined, and operated substantially as described.

5. The combination of the finger h, rod E, spring F, radius-arm I, toem, latch J, hookpawl L, pin p, and stationary arm K, all constructed,arranged, and operating substantially as described.

6. The knock-off finger h, adapted. to be moved in one direction by thespring F, the cam-shaped radius-arm I, the latch J, provided with thepawl-hook L, all attached to and moving with a vibrating or swingingplaten, in combination with a fixed pin, 19, and arm K, when said partsare so arranged that the movement of the platen away from the type-formshall release the toe m from the latch J, allowing the spring F tooperate the finger h, to knock off the card, and then retract the fingerh, cause the latch J to again engage with the toe m, and retain them insuch position till another impression has been made, substantially asdescribed.

Executed at Boston, Massachusetts, this 23d day of August, 1875.

JOSEPH WATSON,

JOHN L. DE HUFF.

Witnesses:

N. (J. LOMBARD, WM. P. EDWARDS.

